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Display Tank Water Level and Refugium?

April 26, 2017display level refugium tank water

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Display Tank Water Level and Refugium?

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Hello Crew: I have been doing a lot of reading in the refugium section. Really want to thank all of you for such a wealth of information. My question is if I put a gravity feed line from above display tank refugium, return pump in the display tank back to refugium. When the power goes out which will happen sooner or later. To keep display tank from overflowing I assume the water level in display tank has got to be lowered the amount of water that is in the return line plumbing. I plan on putting a Durso stand pipe in the refugium for the gravity drain. What is the best way to minimize the amount the display tank water level has to be lowered. Should I possible insert check valve in pump discharge line from display tank to refugium to minimize drain back